Why does the Mercedes-Benz E300 automatically shift to P gear?

[Karl]

Reasons for the Mercedes-Benz E300 automatically shifting to P gear: ignition switch module damage; normal phenomenon. The following are specific explanations for the reasons: Ignition switch module damage: For example, if the key cannot be recognized, a voltage signal will be generated to power the emergency motor of the electronic gear shift module, thereby causing the transmission to jump to P gear. Of course, this emergency procedure also depends on the vehicle speed. If the speed is too high, it will not intervene. The speed limit for different models of Mercedes-Benz vehicles may vary, some limited to no more than 8km/h, some to no more than 11km/h, and generally no more than 15km/h. Normal phenomenon: There are three situations where the Mercedes-Benz automatically jumping to P gear is a normal phenomenon, which is a design feature of Mercedes-Benz: When the vehicle enters the HOLD state, if the door is opened, the automatic P gear function will be activated; When the vehicle speed is between 1km/h-3km/h, opening the door will also activate the automatic P gear function; When the vehicle speed is less than or equal to 10km/h, it is possible to freely switch between D, N, R, and P gears. If the P gear button is accidentally pressed at this time, it will jump to P gear.